EP0092055B1 - Ortsveränderlicher Rundfunkempfänger, wie Autoradio oder dergl. - Google Patents
Ortsveränderlicher Rundfunkempfänger, wie Autoradio oder dergl. Download PDFInfo
- Publication number
- EP0092055B1 EP0092055B1 EP83102636A EP83102636A EP0092055B1 EP 0092055 B1 EP0092055 B1 EP 0092055B1 EP 83102636 A EP83102636 A EP 83102636A EP 83102636 A EP83102636 A EP 83102636A EP 0092055 B1 EP0092055 B1 EP 0092055B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transmitter
- memory
- read
- distance
- transmitters
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
- H03J1/0058—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor provided with channel identification means
- H03J1/0066—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor provided with channel identification means with means for analysing the received signal strength
Definitions
- the invention relates to a portable radio receiver, such as car radio or the like., In particular VHF receiver, of the type defined in the preamble of claim 1.
- a portable radio receiver according to the preamble of claim 1 known (radio show, No. 5, March 1982, page 57 to page 60), in which the fixed memory is designed as an electrically changeable memory (EAROM), in which six transmitter programs each Ten transmitter frequencies of those transmitters that emit the corresponding six transmission programs can be programmed.
- the memory records the programmed information even without operating voltage and can be called up at any time. If the desired transmitter selected by manual selection or by automatic search is set by the automatic transmitter setting device, the readout device, which is part of a microcomputer, continuously reads out those transmitter frequencies which are stored under the address of the broadcast program just received.
- the transmitter frequencies read out are checked by the comparison and selection device, which is also integrated in the microcomputer, to determine whether the reception quality is better than that of the currently received transmitter. As soon as this is the case, the transmitter frequency of the transmitter is specified with the better reception quality of the transmitter setting device and is set by the latter.
- the permanent memory In this known car radio, the permanent memory must be programmed by the user himself, whereby he can or must take into account both his own listening wishes and the geographical location and main driving range of the car. He can preset a total of six different transmission programs and program the transmitters emitting these programs using a transmitter frequency overview. The user must take into account the distance to the individual transmitters and exclude those transmitters from the programming whose distance to the location and main driving area of the car is too great to be received at all or with usable quality.
- the well-known car radio works without problems if the vehicle is only within a radius of approx. Moved 50 km around its location. In the case of longer distances, however, it fails because, on the one hand, the distance to the programmed transmitters increases with increasing travel time and these can only be received poorly or not at all, and on the other hand, transmitters in whose transmission range the vehicle is currently are not programmed.
- a radio receiver in particular an FM receiver, with a device for direct program selection is known.
- This document proposes a transmitter identification, which may also be followed by a selection of the station most worth receiving.
- the invention has for its object to improve a portable radio receiver, such as car radio or the like, of the type mentioned in such a way that, regardless of the location of the vehicle and the distance traveled, a desired and set transmission program by automatically selecting and setting the respective transmitter with the best Reception quality can be received optimally and continuously, without this requiring additional intervention on the part of the driver or user.
- the user is on the one hand freed from the need to select and program the broadcasters with their program types and the associated transmitters with their transmitter frequencies. All transmission programs and corresponding transmitter frequencies that are common in the Federal Republic of Germany and neighboring countries, for example, are stored in the permanent memory.
- the selection, which of the transmitters can now be received based on the vehicle location, is carried out automatically by the transmitter selection device according to the invention.
- the driver can choose from all the stations that can be received there, always after the selection of the desired transmission program according to the criteria optimum reception can be set automatically.
- the radio receiver also has a so-called identification device, with which tuned stations are identified and displayed to the user, even programs can be selected that are not listed in a button selection field for manual selection, but are received in the current driving area of the vehicle can. It is not necessary to know the current location of the vehicle. On the basis of the distance criterion, it is also impossible for an unwanted and thus incorrect transmission program to be set by multiple assignment of a transmitter frequency.
- the additional memory can be spatially separated from the fixed memory or integrated therein. It is only necessary that the spatial coordinates which spatially determine the transmitter which transmits at this transmitter frequency are also called at the same address at which a transmitter frequency is called.
- the spatial coordinates can be the latitude and longitude or the x and y coordinates of an arbitrarily selected network of coordinates that encompass the stored reception area, e.g. the Federal Republic of Germany and neighboring countries.
- a further advantageous embodiment of the invention results from claim 3.
- the distance calculator according to the invention determines from the coordinates of the transmission locations of the read transmitters, their distance from the transmitter location of the currently set transmitter, so that the transmitters are based on a simple comparison with the predetermined maximum distance of the distance criterion can be selected and such transmitters are excluded from the check, in which the distance of the vehicle or radio receiver is greater than the usual transmission range and therefore the transmitter cannot be received at all or can only be received inadequately.
- An advantageous embodiment of the invention also results from claim 5.
- a table of the so-called neighboring transmitters is created in the working memory, that is to say those transmitters which emit the same transmission program as the currently set transmitter and their distance from it is not greater is the specified maximum distance value.
- the transmitters for checking the reception quality are then successively read out from this neighbor transmitter table.
- the neighbor station table is continuously updated as soon as a new station with a changed station frequency but the same transmission program has been set due to the check of the reception quality.
- the invention is described below with reference to an embodiment shown in the drawing.
- the drawing shows a block diagram of an FM receiver in the embodiment as a car radio.
- the FM receiver has a receiving part 10, which contains the intermediate frequency part, the oscillator circuit, the demodulator and the low frequency part in a known manner.
- 11 denotes the antenna and 12 denotes the loudspeaker connected to the low-frequency part.
- the VHF receiver also has a transmitter setting device 13 which is designed as an automatic flow control and tunes the receiving part 10 until a predetermined transmitter frequency is set.
- the transmitter frequency can be by means of a Control panel 14 can be specified manually or from a known automatic transmitter search which tunes the receiving part 10 in response to a start signal and tunes the first station worth receiving. So that in the latter case the user gets knowledge of the set transmitter, a so-called transmitter identification device is to be provided which visually displays the broadcast program of the set transmitter.
- the VHF receiver furthermore has a permanent memory 15 in the form of a PROM, in which a table of the transmitter frequencies of all transmitters emitting this transmitter program is stored for each transmission program. All broadcast programs receivable in a larger broadcast area, preferably in the Federal Republic of Germany and neighboring countries, with assigned transmitter frequencies are contained in the read-only memory. If part of the transmitters are so-called traffic radio transmitters, the area identifier of these transmitters can also be stored.
- Each transmission program is freely accessible via an addressing device 16, which is controlled by the manual control panel 14 or the transmitter identification device.
- the transmitters assigned to a transmission program can be successively addressed via a first control unit 17 of a read-out device 18.
- the control unit 17 can be designed as a simple presettable up / down counter.
- the counter reading of the counter indicates the address of the individual assigned transmitters.
- the counter is addressed by the addressing device 16 together with the addressing of the desired transmission program, e.g. set to the highest counter reading and thereby addresses the first transmitter in the transmitter table of the addressed transmission program. If a transmitter identification device is present, the counter reading is preset to that counter reading which corresponds to the address of the set transmitter.
- the additional memory 19 can be designed as a separate memory or can be integrated into the permanent memory 15, so that both the transmitter frequency and the spatial coordinates of the transmitter location are called up via an address (counter reading) specified by the control unit 17.
- the read-out device 18 successively addresses all transmitters of a selected transmission program until the entire transmitter table of the transmission program has been processed.
- the VHF receiver also has a comparison and selection device 20 which compares the reception quality of the successively read out transmitters with that of the transmitter currently set and received in the receiving part 10 and which indicates the transmitter setting device 13 the transmitter frequency of the transmitter with the best reception quality.
- a transmitter selection device 21 is switched on between the fixed memory 15 and the comparison and selection device 20, which only allows those transmitters that have been read out to check the reception quality, the distance of which to the straight in the receiving part 10 set and received transmitter does not exceed a predetermined maximum distance value.
- a max. Distance value is determined by the usual transmission range of an FM receiver. This makes it possible to allow only those transmitters for comparison and selection whose distance to the current location of the vehicle does not exceed the usual transmission range without the knowledge of the geographical location of the vehicle being necessary for this.
- the transmitter selection device 21 has a distance computer 22 which calculates the distance from the transmitter set and received in the receiving section 10 from the coordinates of the transmitter currently set in the receiving section 10 and the coordinates of the successively read out transmitters.
- the spatial coordinates of the transmitter set in the receiving section 10 are taken into a short-term memory 23 connected upstream of the input of the distance computer 22 for the duration of the setting of this transmitter in the receiving section 10.
- the distance calculator 22 is followed by a comparator 24, which compares the result of the distance calculator 22 with a fixed max. Compares distance value r max , which can be chosen arbitrarily and preferably corresponds to the usual transmission range of an FM transmitter.
- the output of the comparator 24 is connected to the control input of a gate element 25, which has two inputs and two outputs.
- One input of the gate element 25 is connected to the data output of the read-only memory 15, at which the transmitter frequencies are output.
- the associated output is connected to the data input of a working memory 26, which is designed as a read-write memory, preferably RAM.
- the other input of the gate element 25 is connected to the addressing output of the control unit 17. That entrance
- the associated output of the gate element 25 is also connected to a data input of the working memory 26. If the comparator 24 recognizes that the calculated distance is equal to or less than the predetermined maximum distance r max , the inputs and outputs of the gate element 25 are switched to continuity, otherwise blocked. For the sake of clarity, all lines that transmit data are pulled out and control lines for the transmission of control commands are shown in broken lines in the drawing.
- the working memory 26 is successively addressed by a second control unit 27 of the read-out device 18.
- the second control unit 27 can in turn be a simple up / down counter, the counter reading of which forms the address for the working memory 26.
- the control unit 27 is in turn controlled by the comparison and selection device 20.
- the comparison and selection device 20 comprises a further receiving part 28, the structure of which is identical to that of the receiving part 10 and which is also connected to the antenna 11.
- the receiving part 28 is either tuned by a separate transmitter setting device 29, identical to the transmitter setting device 13, or the transmitter setting device 13 is used for this purpose. In the latter case, a holding circuit must be provided in the receiving part 10, which holds the receiving part 10 on the set transmitter, as long as the transmitter setting device 13 in the second receiving part 28 tunes the transmitter frequency read from the working memory 26.
- the field strengths of the transmitters respectively set in the receiving part 10 and in the receiving part 28 are fed to a field strength comparator 30. If the field strength of the transmitter set in the receiving part 28 is equal to or less than the field strength of the transmitter set and received in the receiving part 10, the field strength comparator 30 outputs a control signal to the second control unit 27 of the readout device 18, which then gives the next address in the working memory 26 calls. In the other case, i.e. if the field strength of the transmitter set in the receiving part 28 is greater than that of the transmitter set and received in the receiving part 10, the field strength comparator 30 outputs a control signal to a changeover switch 31, which then changes its switching state and maintains it as long as it lasts Control signal is present at the control input.
- the switch 31 has two inputs, each of which can optionally be assigned to two outputs. One input is connected to the one data output of the working memory 26, at which the read transmitter frequencies occur. This input can optionally be switched to the transmitter setting device 29 or the transmitter setting device 13. The other input of the switch 31 is connected to the data output of the main memory 26, at which the addresses associated with the transmitter frequencies can be removed from the main memory 26. In the basic position of the switch 31 shown in the drawing, this input is connected to an open output and can optionally be switched to another output which is connected to the reading device 18 and which supplies the addresses read out from the working memory 26.
- the data output of the working memory 26 is connected to the transmitter setting device 29 via the changeover switch 31, so that the transmitter frequency read out and to be set in the receiving part 25 is always supplied to it.
- a further short-term memory 45 is connected upstream of the transmitter setting device 13, the data output of which is connected on the one hand to the addressed output of the changeover switch 31 and on the other hand to the data output of the read-only memory 15, at which the read transmitter frequencies occur.
- the readout device 18, the transmitter selection device 21 and at least a part of the comparison and selection device 20 - with the exception of the further receiving part 28 and the further transmitter setting device 29 - are integrated in a microcomputer 32, which is symbolized in the drawing by heavy dotted lines.
- the FM receiver described above works as follows:
- a desired transmission program for example NDR 2 (pressing the "NDR" key and the "2" key) is selected by means of the control panel 14.
- the addressing device 16 thus calls up the transmission program address in the read-only memory and sets the control unit 17 designed as a counter to a counter reading which corresponds to the address of the first transmitter stored in the read-only memory 15 under the send program address.
- the counter 17 is preset via the line 33, which is effected by means of a loading command supplied by the addressing device via the control line 34.
- Fixed memory 15 is addressed via address line 36 and additional memory 19 is addressed via address line 37.
- the fixed frequency 15 reads out the transmitter frequency of the first transmitter and the spatial coordinates of the assigned transmitter location from the additional memory 19.
- the transmitter frequency is supplied to the short-term memory 45 and the spatial coordinates to the short-term memory 23.
- the load command for the counter 17 is simultaneously via the control lines 44 and 35 as write commands to the control command inputs of the Short-term memories 45 and 23, so that the respective information is written into the memories.
- the transmitter frequency written in the memory 45 is fed to the transmitter setting device 13, which tunes the receiving section 10 until the transmitter frequency is set and the transmitter can be listened to on the loudspeaker 12 using the selected transmission program.
- the counter 17 now reduces its counter reading in the next counting section, as a result of which the permanent memory 15 and the additional memory 19 are re-addressed and the transmitter frequency and spatial coordinates of the next transmitter are now read out under the same transmitter program address.
- the spatial coordinates of the next read transmitter are fed to the distance computer 22, at which the memory content of the short-term memory 23, that is to say the spatial coordinates of the transmitter set and received in the receiving part 10, are simultaneously present.
- the distance computer 22 calculates the distance of the two transmitters from one another from the spatial coordinates of the two transmitters according to simple geometric relationships and gives this result to the comparator 24.
- the comparator 24 compares the calculated distance with a predetermined maximum value rmax and outputs a blocking signal via the control line 38 the gate member 25 if the calculated distance is greater than r max, and an enable signal if the distance is equal to or less than fmax .
- the gate element 25 is supplied via line 39, the transmitter address called up at the memories 15 and 19 and via line 40, the transmitter frequency read out from the permanent memory 15 at this address. If the gate element 25 receives an enable signal, the address and the transmitter frequency are written into the working memory 26. Addressing the working memory 26 is not absolutely necessary here, rather the memory locations can be occupied one after the other.
- the counter 17 now reduces its counter reading in a further down-counting step and thus addresses a new transmitter from the memories 15 and 19.
- the process described above is repeated continuously until the counter 17 has reached its counter reading zero. All transmitters which emit the same transmission program are thus stored in the working memory 26 with regard to their transmitter frequency and their address, under which they can be found in the memories 15 and 19, to the extent that they satisfy the distance criterion, that of the receiver section 10 set stations are not further away than the specified maximum distance.
- the control unit 27, which is also designed as a simple counter, now addresses all the transmitters stored in the working memory 26 one after the other.
- the read-out address of the transmitter and the read-out transmitter frequency are fed to the changeover switch 31 from the working memory 26 for each transmitter via line 41 and the read transmitter frequency via line 42.
- the switch 31 is set so that the read transmitter frequency is fed to the transmitter setting device 29, which sets this transmitter frequency in the second receiving part 28.
- the field strength of the transmitter set and received in the receiving part 10 and the field strength of the transmitter set in the receiving part 28 are now fed to the field strength comparator 30. If the field strength of the transmitter set in the receiving section 28 is equal to or less than the field strength of the transmitter set in the receiving section 10 and audible via the loudspeaker 12, the field strength comparator 30 sends a signal to the control unit 27, which then reads out the next transmitter stored in the working memory 26 . This process is repeated continuously until the field strength comparator 30 determines a field strength in the receiving part 28 which is greater than the field strength of the transmitter set in the receiving part 10 and audible in the loudspeaker 12.
- a control pulse arrives at the changeover switch 31, which on the one hand disconnects the line 42 from the transmitter setting device 29 and connects it to the write-in input of the short-term memory 45, and on the other hand connects the line 41 to the preset or charging input of the first control unit 17 via the line 33.
- the transmitter frequency last read out from the working memory 26 is thus written into the short-term memory 45 and from there fed to the server setting device 13, which in turn tunes the receiving part 10 to the new transmitter frequency.
- a new transmitter with the same transmission program but better reception quality can be heard on the loudspeaker 12.
- the writing of the new transmitter frequency into the short-term memory 45 is made possible by the control pulse of the field strength comparator 30 for the changeover switch 31, which is applied via the control lines 43 and 44 as a write-in command to the control command input of the short-term memory 45.
- the address assigned to this transmitter frequency, which was last read from the working memory 26, is fed via line 41 and line 33 to the first control unit 17, and the counter representing this control unit 17 is thus preset.
- the counter is enabled by the control pulse given by the field strength comparator to the changeover switch 31, which also reaches the counter via the control lines 43 and 34.
- the control unit 17 calls from the additional memory 19 the spatial coordinates of the now newly set transmitter, which are written into the short-term memory 23.
- the control pulse just mentioned also reaches the control command input of the short-term memory 23 via the control lines 43 and 35.
- the counter 17 counts its set counter status step by step downward, a new station table of stations worth receiving being rewritten in the working memory 26 in the manner described.
- This new transmitter table meets the distance criterion for the newly set and received transmitter.
- This new station table of the working memory 26 is then checked for reception quality in the same manner as described above.
- the invention is not restricted to the exemplary embodiment described above. So the second receiving part 28 is not absolutely necessary.
- the function of this receiving part 28 can also be taken over by the receiving part 10 if the reception quality check is carried out in the transmission pauses by means of a suitable pause detection.
- the direct connection of the short-term memory 45 to the changeover switch 31 is also not necessary.
- the short-term memory 45 can also be loaded from the fixed memory 15 after the detection of a new transmitter with better reception quality - as in the manual program selection.
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Circuits Of Receivers In General (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Transmitters (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT83102636T ATE20632T1 (de) | 1982-04-17 | 1983-03-17 | Ortsveraenderlicher rundfunkempfaenger, wie autoradio oder dergl. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823214155 DE3214155A1 (de) | 1982-04-17 | 1982-04-17 | Ortsveraenderlicher rundfunkempfaenger, wie autoradio oder dgl. |
DE3214155 | 1982-04-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0092055A1 EP0092055A1 (de) | 1983-10-26 |
EP0092055B1 true EP0092055B1 (de) | 1986-07-02 |
Family
ID=6161123
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83102636A Expired EP0092055B1 (de) | 1982-04-17 | 1983-03-17 | Ortsveränderlicher Rundfunkempfänger, wie Autoradio oder dergl. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4476582A (ja) |
EP (1) | EP0092055B1 (ja) |
JP (1) | JPS58188938A (ja) |
AT (1) | ATE20632T1 (ja) |
DE (1) | DE3214155A1 (ja) |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5552627A (en) * | 1978-10-12 | 1980-04-17 | Sony Corp | Receiver |
DE2850733C2 (de) * | 1978-11-23 | 1985-07-18 | Blaupunkt-Werke Gmbh, 3200 Hildesheim | Rundfunkempfänger, insbesondere UKW- Empfänger, mit einer Einrichtung zur Programm-Direktwahl |
DE2850866C2 (de) * | 1978-11-24 | 1985-01-10 | Adam Opel AG, 6090 Rüsselsheim | Verfahren zum Auffinden des empfangsstärksten Senders bei einem mobilen Rundfunk- oder Fernsehempfangsgerät und Gerät zur Ausführung des Verfahrens |
NL8003087A (nl) * | 1980-05-29 | 1982-01-04 | Philips Nv | Ontvanger met een zenderzoekschakeling. |
US4387469A (en) * | 1980-06-03 | 1983-06-07 | Clarion Co., Ltd. | Tuner control system |
JPS5726918A (en) * | 1980-07-24 | 1982-02-13 | Mitsubishi Electric Corp | Receiver |
US4430753A (en) * | 1980-07-24 | 1984-02-07 | Mitsubishi Denki Kabushiki Kaisha | Radio receiver |
DE3034155C2 (de) * | 1980-09-11 | 1985-10-10 | Becker Autoradiowerk Gmbh, 7516 Karlsbad | Verfahren und Schaltungsanordnung zum Abstimmen eines Rundfunkempfängers |
JPS5795720A (en) * | 1980-12-04 | 1982-06-14 | Mitsubishi Electric Corp | Receiver |
-
1982
- 1982-04-17 DE DE19823214155 patent/DE3214155A1/de active Granted
-
1983
- 1983-03-17 AT AT83102636T patent/ATE20632T1/de not_active IP Right Cessation
- 1983-03-17 EP EP83102636A patent/EP0092055B1/de not_active Expired
- 1983-04-13 US US06/484,569 patent/US4476582A/en not_active Expired - Lifetime
- 1983-04-13 JP JP58063810A patent/JPS58188938A/ja active Granted
Non-Patent Citations (1)
Title |
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Funkschau, Nr. 5, März 1982, Seiten 57 bis 60, H. Bahr: "Intelligentes Autoradio" * |
Also Published As
Publication number | Publication date |
---|---|
US4476582A (en) | 1984-10-09 |
EP0092055A1 (de) | 1983-10-26 |
JPH0342734B2 (ja) | 1991-06-28 |
DE3214155A1 (de) | 1983-10-20 |
ATE20632T1 (de) | 1986-07-15 |
DE3214155C2 (ja) | 1989-11-16 |
JPS58188938A (ja) | 1983-11-04 |
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